Dumb, as being stupid.
I'm building a 1/48 Eduard Pfalz. Glued on the bottom wing, drilled holes for rigging, put on the turnbuckles, filled and sanded the gaps and primed ready for paint.
Only then did I discover that for some reason Eduard included two bottom wings with the kit, without mentioning this fact in their instructions, and I had installed the wrong frigging one. Fortunately I removed the wing this morning with little damage, so here I go again.. sigh.....